Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan cac le snippets" » "luan dac le snippets", "luan tac le snippets", "luat cac le snippets", "luan cach le snippets", "luan cac he snippets", "luan mac le snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("luan cac le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan cac le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan cac le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan cac le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.